condition mean min max 0 h after light 6.98928 6.56491 7.41365 4 h after light 8.35994 7.5405 9.17938 8 h after light 7.221259999999999 5.46765 8.97487 4 h after dark 5.87255 5.64921 6.09589 8 h after dark 3.7801400000000003 3.17403 4.38625 12 h after dark 5.24086 4.76807 5.71365